Finding the Third Proportional to 285 and 557
Calculator
Solution
The third proportional to 285 and 557 is: 1,088.59
Step by Step Solution
- Step 1: Write the proportion equation
285 : 557 = 557 : x - Step 2: Convert to fraction form
285/557 = 557/x - Step 3: Cross multiply
285x = 557 × 557 - Step 4: Simplify right side
285x = 310,249 - Step 5: Solve for x
x = 310,249/285 - Step 6: Final answer
x = 1,088.59
Related Problems
Find third proportional to 142.50 and 278.50
Half scale
Find third proportional to 570 and 1,114
Double scale
Find third proportional to 287 and 561
Similar ratio
Find third proportional to 427.50 and 835.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.